Khloe Kardashian’s ‘cheating’ heartache will be featured on KUWTK

Khloe Kardashian happily strikes a pose while attending the Good American Activewear Performance Line Launch Celebration held SIX:02 Time Square on Thursday (August 2) in New York City.

Kourtney Kardashian thinks it's "really special" that her siblings have had children within months of each other.

Kourt told Khloe that she was exhausted of being treated poorly because she didn't have the same priorities as her sisters, adding that she is content being a mother to her three children, Mason, Penelope, and Reign.

For Kardashian, the new activewear collection from Good American - the clothing brand she co-founded with Emma Grede - is the ideal fit.

Kim, 37, shared a black and white shot of all the sisters on her social networking site but opted for a different photo as she and Khloe rocked the autumn sports bra and knickers, while Kendall, Kourtney and Kylie modelled the new jean collection. Kim Kardashian's daughter Chicago West was born in January via surrogate, and Kylie Jenner gave birth to Stormi Webster in February.

She said: "I don't even know how to describe it besides it's just so f***ked up".

Khloe said: "I think she knows that, if I have been away because when I come back, she gets so excited to see me - that just no matter how exhausted you are after work or whatever, it melts your heart".

"Honestly, I think it's ongoing".

Many asked what was wrong with Kourtney's arm.

The video caused a stir, with many people villainising Kim for shaming her own sister.

"You get so much advice when you're becoming a new mom", Kardashian told the magazine Wednesday.

Kim told Kourtney she is "the least exciting to look at".

CalvinKlein just released another underwear and jeans campaign featuring all of the Kardashian sisters. "I know everyone says that but it is", she laughed.

The oldest of the three reality TV sisters takes a lead role in season 15 of KUWTK, which premieres Sunday night.